Masthead flagstaff



FIG. 1 is a front elevational view of a masthead flagstaff showing mynew design;

FIG. 2 is a right side elevational view;

FIG. 3 is a left side elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a bottom plan view.

The ornamental design for a masthead flagstaff, as shown and described.